Question

Magnesium ribbon when burnt in air forms ash. The chemical composition of the ash formed and the change involved is:

• A. Magnesium oxide, physical
• B. Magnesium oxide, chemical
• C. Magnesium hydroxide, physical
• D. Magnesium hydroxide, chemical

Answer 1

The correct option is B Magnesium oxide, chemical

Magnesium ribbon is burnt in air to form ash of magnesium oxide. This can be represented as:

Magnesium + Oxygen $\to$ Magnesium oxide

This is an example of a chemical change since new substance is formed here.